EP 1898677 A3 20110907 - Colour feedback with single optical sensor
Title (en)
Colour feedback with single optical sensor
Title (de)
Farb-Feedback mit einem einfachen optischen Sensor
Title (fr)
Rétroaction de couleur avec détecteur optique simple
Publication
Application
Priority
US 84340906 P 20060911
Abstract (en)
[origin: EP1898677A2] A method for controlling an illumination system comprises determining first drive settings for each of a plurality of coloured light sources, the first drive settings generating an ON time and an OFF time of the light sources; for each of the light sources of a first colour and the light sources of a second colour changing the first drive settings so that the ON time of the light sources of a selected one of the first and second colour does not coincide with the ON time of the light sources of the other colours for at least a period of time, and during that period of time, measuring the peak luminance of the light sources of the selected colour; and for each of the light sources of the first colour and the second colour recalculating the drive settings into second drive settings, based on the measured peak luminance for the light sources of that colour, so as to maintain a pre-determined colour point.
IPC 8 full level
H05B 33/08 (2006.01); H05B 37/02 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/22 (2020.01 - EP US); G09G 3/3413 (2013.01 - EP US); G09G 2320/064 (2013.01 - EP US); G09G 2320/0666 (2013.01 - EP US); H05B 45/28 (2020.01 - EP)
Citation (search report)
- [XY] US 2005117367 A1 20050602 - CHIKUGAWA HIROSHI [JP]
- [Y] US 2005117190 A1 20050602 - IWAUCHI KENICHI [JP], et al
- [Y] US 2004113044 A1 20040617 - ISHIGUCHI KAZUHIRO [JP]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
EP 1898677 A2 20080312; EP 1898677 A3 20110907; EP 1898677 B1 20171018; US 2008065345 A1 20080313; US 8175841 B2 20120508
DOCDB simple family (application)
EP 07017725 A 20070911; US 89809407 A 20070910